Pedal-operator.



J. C. CAKE. PEDAL OPERATOR. APPLIGATIONTILED JULY 15, 1912. 1,085,108.Patented Jan. 27, 1914,

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f1 Him/nui J. C. CAKE.

PEDAL OPERATOR.

APPLICATION FILED JULY15,1912.

Patented Jan. 2T, 1914.

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] 11. vento/c coLuMBM PLANQGRAPH Co., WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

JOHN C. CAKE, OF CHESTER, PENNSYLVANIA.

PEDAL-OPERATOR.

Original application led January 12, 1911, Serial No. 602,437.

To all whom t may concern Be it known that I, JOHN C. CAKE, a citizen ofthe United States, residing at Chester, in the county of Delaware andState of Pennsylvania, have invented certain new and useful Improvementsin Pedal-Operators, of which the following is a specification.

My invention relates to improvements in pedal operators, the object ofthe invention being to provide improved mechanical means for operatingthe pedals of pneumatic pi anos, organs, and the like in which the speedof the mechanical means is increased and decreased coextensive with theincrease and decrease of electric current supplied to a motor drivingthe mechanical means.

This invention is a division of my application tiled January 12, 1911,and given Serial No. 602,437.

Vith these and other objects in view, the invention consists in certainnovel features of construction and combinations and arrangements ofparts as will be more fully hereinafter described and pointed out in theclaims.

In the accompanying drawings: Figure 1 is a view in side elevationshowing the electric motor partly broken away and illustrating myimprovements. Fig. 2 is a view in section on the line 2 2 of Fig. 1 withparts omitted for purposes of clearness. Fig. 3 is a view in section onthe line 3 3 of Fig. 2. Fig. 4 is a perspective view of my improvedresistance, and Fig. 5 is a diagram.

In connection with my improved electrical. control, I have illustratedthe same in connection with my improved pedal operator claimed in aseparate application executed on even date herewith, and in which 1represents a base having brackets 2 thereon provided with bearings 3 attheir upper ends 1n which a shaft 4 is mounted. On this shaft. 4 at itsends, crank arms 5 are secured and support rubber tired wheels G whichare adapted to engage pedals (not shown) or other suitable devices tocause them to move upwardly and downwardly as the crank shaft isrevolved.

Power is transmitted to a relatively larger sprocket wheel 7 secured ltoshaft 4 by means of an endless chain 8 which is passed around arelatively small sprocket 9 on a shaft 10. This shaft 10 is positionedparallel to shaft 4 and is preferably supported in the upperSpecification of Letters Patent.

Patented Jan. 27,1914.

Divided and this application filed July 15,

Serial No. 709,339.

ends of uprights 12 on base 1. This shaft 10 is provided with alongitudinal groove 13 in which a friction pulley 14 is keyed to slide.This pulley 14 at one side, is provided with a grooved hub 15 into whichpins 16 on the ends of a forked arm 17 project. This forked arm 17 issecured upon an angular shaft 18 mounted to turn in brackets 19 on base1, and to this shaft 18 a foot lever 20 is secured. By depressing thisfoot lever 20, the forked arm 17 is swung in one direction to slide thefriction pulley 14, while a spring 21 returns the parts to normalposition. The friction wheel 14 engages the face of a friction disk 22which is secured on a drive shaft 23 supported in a bea-ring 24 on theupper end of a bracket 25 fixed to base 1. In this bearing 24, setscrews 2G are located and bear against a collar 27 on shaft 23. Byadjusting these screws 2G, the engagement of the disk 22 with thefriction pulley 14 can be regulated to produce the best results.

As seen in Fig. 1` the pulley 14 is located approxiniately at the centerof disk 22, so that little if any motion will be transmitted from thedisk to the pulley. As the foot lever 20 is depressed, the arm 17 willcompel the pulley to move longitudinally of shaft 10 and radially ofdisk 22 toward the outer edge of the latter. As the pulley 14 is movedoutwardly, thc speed of transmission will be increased on account of theincreased diameter of the disk in engagement with the pulley. IVhentherefore, the device is in operative position, the speed may be readilycontrolled by operating the foot lever 20, the downward movement of saidlever increasing the speed and the upward movement. of the lever throughthe medium of spring 21, causing the pulley to move inwardly reducingthe speed. The shaft 23 is driven by an electric motor 24a and theelectric current supplied this motor is controlled by the foot lever 20.A box 29 of insulation is secured by screws 30 to upright. 12, and isprovided with a coil or other resistance 31 which projects beyond theface of the box. lVith this resistance coil 31, a spring contact 32engages. This contact 32 is secured to a block 33 of insulation fixed tofootl lever 2O and provided with a binding post 34, and the lower end ofthe resistance coil 31 is connected to a binding post 35.

As seen in the diagram of Fig. 5, the contact and resistance 3l are inan elect-ric circuit including a battery or other source of electricity'supply 36, and the motor 24C. Vhen the motor starts, the lever will bein its highest position, so that the maximum of resistance is in thecircuit. As the foot lever 2O is depressed to move the pulley radiallyof the disk, the contact 32 will be moved along the resistance coil toeut out the resistance and thereby increase the electric currentsupplied the motor. It will thus be seen that as the mechanical meansare operated to increase the speed of the device, the electric meanswill be simultaneously operated to increase the poweiI of the motor,thus the electrical and the mechanical means will be simultaneously anduniformly controlled by the operation of a single foot lever.

As above stated, I do not limit myself to the particular materialforming the resistance and various other changes might be made in thegeneral form and arrangement of parts described Without departing frommy invention, and hence l do not limitl myself to the precise detailsset forth, but consider myself at liberty to make such changes andalterations as fairly fall within the spirit and scope of the appendedclaims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

l. In a pedal operator, the combination with pedal engaging means,mechanical mechanism controlling the speed of the pedal engaging means,an electric motor driving the pedal operator, and means operated by thespeed controlling means for controlling the electric power transmittedt0 the motor, substantially as described.

2. A pedal operator comprising pedal operating means, an electric motordriving said means, electrical resistance in circuit wit-li a source ofelectricity supply and said motor, a lever controlling the speed of themechanical transmission, and a contact on said lever movable against theresistance and cutting out the resistance as the speed of the mechanicaltransmission is increased, substantially as described.

3. A pedal operator comprising pedal operating devices, a friction disk,an electric motor driving the friction disk, a friction pulley engagingthe face of the friction disk and transmitting motion to the pedaloperating means, a lever constructed to move said pulley across the faceof the disk, a resistance coil, a contact on the lever engaging saidresistance coil, and said contact, said resistance coil, and said motorincluded in an electric circuit with a source of electricity supply,substantially as described.

In testimony whereof l have signed my name to this specification in thepresence of tvo subscribing witnesses.

JOHN C. CAKE.

litnesses S. W. Fos'fnn, Clins, E. Por'rs.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

